The loch is large with an irregular shape and has perimeter of 12.8 km (8.0 mi).

Garrett and later charted[4] as part of Sir John Murray's Bathymetrical Survey of Fresh-Water Lochs of Scotland 1897-1909.

[5] On the eastern shore, near Achavarn, lies the site of a broch, although much of the structure has been removed.

[6] It is thought that there was an artificial island or crannog near the western shore dating from the 17th century.

[7] A short distance to the west of the loch is Aultan Broubster a ruined stone circle.